AI0-001 AI Models and Data Engineering Practice Question
An organization needs to store sensitive customer data for training a machine learning model. The data must be encrypted at rest and in transit, and access must be audited. Which combination of practices should be implemented?
⚠ Common exam trap
CompTIA often tests the distinction between encryption (AES) and hashing (MD5), and the requirement for both in-transit and at-rest encryption, leading candidates to confuse SSH or FTP with proper TLS-based encryption.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use TLS for transfer, AES-256 for storage, and AWS CloudTrail for auditing
It combines TLS (Transport Layer Security) for encrypting data in transit, AES-256 for strong encryption at rest, and AWS CloudTrail for auditing API-level access. TLS ensures confidentiality and integrity during transmission, AES-256 provides robust symmetric encryption for stored data, and CloudTrail logs all AWS API calls for compliance and audit trails. This triad satisfies the requirements of encryption in transit, at rest, and audited access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use TLS for transfer, AES-256 for storage, and AWS CloudTrail for auditing
Why this is correct
These provide encryption and auditing.
- ✗
Use FTP for transfer, AES-128 for storage, and manual log review
Why it's wrong here
FTP is not encrypted.
- ✗
Use SSH for transfer, store data in a database, and enable access logs
Why it's wrong here
SSH encrypts but database storage may not be encrypted.
- ✗
Use MD5 for hashing, store data in plaintext, and enable server logs
Why it's wrong here
MD5 is not encryption and plaintext is insecure.
Quick reference
Symmetric Encryption Algorithm Comparison
| Algorithm | Key Size | Block Size | Status | Notes |
|---|---|---|---|---|
| AES-128 | 128-bit | 128-bit | Current standard | NIST approved; WPA3, TLS |
| AES-256 | 256-bit | 128-bit | Current standard | Preferred for sensitive / govt data |
| 3DES | 112-bit effective | 64-bit | Deprecated (2023) | Replaced by AES |
| DES | 56-bit | 64-bit | Broken | Cracked in < 24 h; never deploy |
| ChaCha20 | 256-bit | Stream cipher | Current | TLS 1.3, WireGuard |
About these practice questions
This AI0-001 question is part of Courseiva's 754-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AI0-001 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AI0-001 exam.